I don’t get it though, the whole point of the joke is “here’s a real thing that sounds a bit like a song lyric”. You can make anything up that sounds a bit like a song lyric, why is that supposed to be funny? Or is it because IKEA product names are a bit weird so that’s supposed to be funny? Like a picture of a table with “SLÅG” written next to it or something. Except “SLÅG” also sounds like part of a lyric.

I think it’s just down to whether or not you hear the song before you really read the words properly? For me the Frasier one doesn’t reality work: it’s been many years since I saw it but if he’d written

…but I don’t know what to do with those

I’d have heard the song first so found it fairly amusing.

I actually rate the Henry VIII one @dingaling posted better on that basis